- Arm II: Patients wear placebo wristbands on each wrist beginning approximately 1 hour before their first chemotherapy session and continuing for at least 24 hours after completing chemotherapy. Patients do not wear wristbands for their second chemotherapy session. Patients wear Sea-Band acupressure wristbands on each wrist beginning approximately 1 hour before their third chemotherapy session and continuing for at least 24 hours after completing chemotherapy.